This directory contains common-use classes, most of which are not specific to GSM.

```
Vector          A vector class (NOT std::vector<>) that supports aliased subvectors. Not resizable.
BitVector       Bit-indexable vectors based on Vector.
Interthread     A set of C++ wrappers for pthread facilities.
Sockets         A set of C++ wrappers for Unix sockets.
Timeval         A C++ wraper for struct timeval.
LinkLists       Classes for simple linked lists of pointers.
Logger          A logging interface based on syslogd.
Configuration   A key-value configuration table.
Regexp          A C++ wrapper on stdlib regular expressions.
```

Do "make tests" to build a series of unit tests for these classes.